Buttonhole-sewing-machine cutter device.



No. 674,:76. 4 Patented May I4, |1901.

w. N. PARKES. BUTTDANHOLE SEWING MACHINE CUTTER DEVICE. (Application filed Jan. 24, 1900.) (No Model.) I 2 Sheets-'Sheet I.

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BUTTONHLE SEWING MACHINE CUTTER DEVICE.

(Application tiled Jan. 24, 1900.) v (No Model.) 2 Sheets-Shest 2.

TN: Ncnms PETERS cu., FHoTo-LITNO.. wAsHmGmN, q. c.

UNITED STATES PATENT OFFICE.

VVIIQLIAM N. PARKES, OF BROOKLYN, YORK.

BUTTONHOLE-SEWING-MACHINE CUTTER DEVICE.

SPECIFICATION forming' part of Letters Patent No. 674,176, dated May 14, 1901.

Original application led September l2, 1898l Serial No. 690,777. Divided and this application led January 24, 1900. Serial No. 2,570. .iNo model.)

T all whom t may con/cerro:

Be it known that I, WILLIAM N. PARKES, a citizen of the United States of America, residing in the borough of Brooklyn, New York city, county of Kings, and State of New York, have invented new and useful Improvements in Buttonhole-SeWing-Machine Cutter Devices, of which the following is a specification.

On September l2, 1898, I filed an application for a patent on a buttonhole-sewing machine, Serial No. 690,777, patented September 25, 1900, No. 658,578, of which this application is a division.

The main object of my invention is to provide asimple automatic cutter device for buttouholesewing machines-a cutter device that will not limit the speed of the machine, that will not derange the working parts of the same when'thrown into action, and that will not wear the said working parts. These and other objects will appear more clearly when described in connection with the accompanying drawings, in which- Figure 1 is a front end View of a machine embodying my invention. Fig. 2 is a top plan `view of the cutter-carrier-tripping mechanism before it has been actuated; and Fig. 3 is a side view of the lower end of the cam-rod which trips the cutter into action, showing the position of the same before it has been actuated to trip the cutter, Figs. 4 and l5 show the positions of the parts in Figs. 2 and 3 j ust after they have been actuated, the spring 38 being omitted. Fig. 6 is the cutter-carrierl plate. Fig. 7 is the cutter-carrier on an enlarged scale, its extremities broken away,

showing some details' in connection with the same. Fig. 8 is a perspective View, on an enlarged scale, of a part of the wheel through the movements of which the cutter device is. tripped into action. Fig. 9 shows the latch and catch of the stop-motion device in their normal positions. Fig. 10 shows the same parts after the stop-motion has been tripped. Fig. 11 is a rear View of a machine embodying my invention. Fig. 12 is a detail perspective view of a part of the cutter-carrier holding and tripping mechanism.

inthe before-referred-to patent, No. 658,578.

In the drawings, A designates the arm, B l

the bed-plate, and C,v the needle-bar, of the machine. A cutter-carrier 1 is mounted in suitable bearings in the head of the machine. To the lower end of the cutter-carrier is attached a plate 2, which is adapted to carry a usual cutter-holder 3. A spring 4 im pinges at its upper end` against a usual cylindrical nut 5, through which the upper end of the cutter-carrier passes, the nut being suitablybearing lOof the head of the machine, serves as a means for taking the blow of the cuttercarrier. On a suitable bearing 11, located just back of the lower end of the cutter-carrier, is pivoted a leverr 12, one end, as at 13, of which is adapted to support a horizontal projection 14,`formed on the plate 2. A 1ever 15 is pivoted on a suitable bearing at 16. In one end of the said lever 15 is formed a fork, as shown lin Figs. 2 and 4, and to the other end is pivoted a trip-dog 17, which eX- tends outwardly into a way 18, formed in the free end of the lever 12. Any usual means can be used at the pivot of the trip-dog 17 for producing a friction on thedog, so as to prevent undesirable movement of the same.

A tooth or abutment 19, formed on the tripdog 17, is adapted to engage a tooth or abutment 20, formed on the lever 12, as shown in Figs. 2 and 4.

Acam-rod 21 is pendent in a suitable manner from the forward end of a lever 22, which is pivoted at 23, as shown in Fig. 11. The lower end ofthe rod 21 passesthrough ahorizontallyextending portion of a piece 24, which is suitably attached tothe head of the machine, said piece serving as a means for guiding the lower end of the said rod; as shown in Figs. 3 and 5. A bent or cam portion 25 of the rod engages the forked end of the lever 15 and thereby operates the said lever on yits pivot IOO i; g l 674,176

when the rod is reciprocated longitudinal of its length. A link or rod 26 is at one end attached to the rear end of the lever 22 and at its other end to a suitably-pivoted latch 27 of the stop-mechanism device before referred to.

I will now describe the stop mechanism so far as it is thought necessary for a clear understanding of the manner in which it is adapted to trip the cutter device into action. A lever 28 is suitably pivoted on a stud which has a seat inthe arm of the machine. A spring 29 is at one end attached to the lower end of the said lever and at its other end to means (not shown) which adapts it to draw on the lower end of the lever in the direction indicated by the arrow shown in Fig. 9. When the stop mechanism is in its normal position, the lower end of the lever 28 is held in the position shown in Fig. 9 against the action of` the spring 29 by means of a catch 30, having a notch 31 formed therein, which notch is engaged by the latch 27. One end of a small lever 32, which is pivoted on a ratchet-wheel 33, is adapted to engage the free end of the latch 27 and lift it out of the notch 3l, and thereby trip the stop mechanism. The wheel 33 turns in the direction indicated by the arrow, Figs. 9 and 10. The lever 32 when it comes into engagement with the latch turns it on its pivot against a small spring 34 until a pin (not shown) which extends into a slot 35, formed in the wheel 33, comes into contact with one side of the said slot, when further movement of the wheel lifts the latch 27 out of the notch 31. W'hen the latch is lifted out of the notch, the spring 29 draws the lower end of the lever 28 in the direction indicated by the arrow shown in Fig. 9, which movement draws the catch 30 in the same direction. As this movement takes place a camsurface 3G, formed on the catch 30, lifts the end of the latch 27 until it reaches the position shown in Fig. 10. This movement of the latch 27 raises the rear end of the lever 22 and of course thereby lowers the forward end of the same, and as the forward end is lowered the cam-rod 21 is lowered, and thereby the cam portion 25 of the said rod engages the forked end of the lever 15 and thereby turns the said lever on its pivot. This movement of the lever 15 causes the trip-dog 17 to engage the lever l2 and turn the same on its pivot, which removes the portion 13 of the said lever from under the extending portion 14 of the plate 2, when the cutter is depressed through the action of thespring 4. A light spring 37 is at one end attached to the rear end of the lever 22 and at its other end to the arm of the machine. This spring normally draws down on the rear end of the said lever, and thereby returns the latch 27 into the notch 31 of the catch 30,- when the stop mechanism is returned to its normal position, which position brings the notch under the latch. This, it is seen, returns the camrod 21 to its normal position. As it is desirable to return the cutter-carrier to its normal position before the stop mechanism is returned to its normal position, the following means are preferably provided for this pill'- pose: A small spring 38 is at one end attached to a screw 39, which has a seat in a bearing 40, and at its other end to the lever 12. This spring normally turns the said lever on its pivot in the direction indicated by the arrow shown in Fig. 4. A cam-surface 41 is formed on the plate 2 and is adapted to er1- gage the trip-dog 17, as shown in Fig. 4, when the cutter descends, and thereby moves the said dog on its pivot and disengages the tooth 19 from the tooth 20. This disengagement of the dog from the lever 12 allows it to return to its normal position, which it does through the action of the spring 38 just as soon as the cutter-'carrier descends to its lower or depressed position. This brings the edge of the part 13 over the part 14. As thecutter-carrier is elevated an incline 42, formed on the edge of the part 14, engages an ineline 43, formed on the edge of the part 13, and thereby turns the lever 12 on its pivot so that the part 14 can move up and above the part 13. After the part l14 has moved above the part 13 the lever 12 through the action of the spring 38 again turns on its pivot, and the part 13 of the same turns unr der the part 14 of the plate 2, and thereby holds the cutter-carrier in its elevated position.

I will now describe the means for returning the cutter-carrier to its elevated position after it has been actuated. A lever 44 is pivoted on the head of the machine at 45. This lever has an inwardly extending lug 46 (shown in dotted outline in Fig. l1) formed on it near its forward end, which is suitably adapted to engage the roller 7 of the arm 6, extending from the cutter-carrier. At the rear end of the lever 44 is attached a rod 47, to the lower end of which is attached a chain 48. This chain 48 is at its lower end (not shown) attached lo an ordinary foot-lever, (not shown,) which serves as means for operating the lever. As the operator depresses the rear end of the lever 44 the forward end is of course raised, and the lug thereby engages the roller 7 of the arm 6 and elevates the cutter-carrier. An ordinary spring 49 normally turns the lever 44 on its pivot until the rear end of the 'same comes into contact with a pin 50, projecting from the arm of the machine, as shown in Fig. 11. This, it is seen, serves as a means for keeping the forward end of the said lever and through it the lug 46, which is formed on the same, down, so that the cutter-carrier is free to operate Y without the roller 7 of the arm (i coming into contact with the said lug.

I provide means for preventing the cuttercarrier from being inadvertently depressed, which means I will now describe. A rod 51 is suitably mounted ina bearing52 and adapted to move longitudinally in said bearing. (See Fig. 1.) The said rod is at its forward ICO yIO

Atrarre' v i piece or collar 58 is attached -to the rod 51 and is adjustable longitudinal of the said rod. A post 59, extending upwardly from a bearing 60, which is carried by the lower member 61 of the work-carrier, is adapted to engage the piece 58. The work-carrier is reciprocated in a direction longitudinal of the rodl 51 by means which are fully illustrated and described in the application Serial No..690,777, before referred to. The cutter-carrier is operated when the work-carrier is in 'its extreme position in the opposite direction to that which is indicated by the arrow in Fig. l. The piece or collar 58 is adjusted on the rod 51 so that the post 59 engages the said collar,

and thereby disengages the end of the rod 51 from the plate 2 just previous to the tripping of the cutter device. Thus, it is seen, if the cutter is tripped before the work-carrier is in the proper position the cutter will be prevented from descending by the rod 51, as the end of thesaid rod will still be in the hole in the plate 2.

The stop mechanism trips the cutter; but4 if for any reason the stop mechanism is thrown into action before the work-carrier is in the proper position for the cutter to descend the rod 5l will prevent the same from descending. Thus the advantage of this device in connection with a spring-depressed cutter operated through the movement of the stop mechanism is seen.

A gap 62 is formed in the teeth of the ratchet-wheel33. Asegment 63, having teeth formedv thereon which are coincident with the teeth on the said wheel, is adj ustably attached to the side of the same, as shown in Fig. 8. This segment serves as a means for adj ustably closing the gap in the teeth of the wheel 33. A pawl 65 engages the wheel 33. The means which operate the said pawl are so constructed that the pawl commences its forward movement at the same point under different adjustments of the extent of the stroke of the pawl, all of which is fully illustrated and described in the application of which this application is a divisin.

The tripping-lever 32 is so located on the wheel 33 that the beginning of the engagement of the pawl 65 with the tooth 64 of the wheel 33 trips the stop mechanism into action. The gap 62 in the teeth of the wheel 33 is adjusted by means of the segment 63, so that the pawl will just cross the same and engage the tooth 64. Thus it is seen that by adjusting the segment 63 so that the gap 62 is the proper extent the pawl will always lever to its normal position.

engage the tooth 64, and as the stroke of the pawl always commences at the same point under different adjustments of the extent of the stroke of the same the stop mechanism will always be tripped at the same time relative to the position of the wheel 33 or any parts` that may be operated through the movements of the said wheel. mechanism is always tripped into action at the same time relative to the positionof the wheel 33, it of course follows that the cutter device is also tripped into action at a given time relative to the position of the wheel 33 or any part operated through the movement of the said wheel.

When the stop mechanism is returned to As the stopits normal position, the trip-dog 17 is returned to its normal position rh rough the followingl means: As the latch 27 drops into thenotch in the catch 30 the rear end of the -lever 22 is lowered and the forward end correspondingly raised, which movement raises the rod 21 and through the engagement of the same with the fork of the lever 15 returns the said This movement of the lever moves the dog 17in the opposite direction to that indicated by the arrow in Fig. 1. This movement of the dog brings a `9S cam-surface 66, formed on the edge ofthel same, into engagement with the portion 67 of the way, whereby the dog is turned on its pivot and the tooth 19 on the same brought into a position lever.

What I claim as new is- 1. In a buttonhole-sewingmachine, stitching mechanism', feeding mechanism, a cuttercarrier, a spring acting on the said cuttercarrier for depressing the same, means for lifting the cutter-carrier, a movable support for holding the carrier in an elevated position, a projection on the cutter-carrier adapted to rest on the said support, a spring for turningthe support under the said projection, a trip-dog adapted to engage the support and trip the cutter-carrier, means for actuating the trip-dog, a cam carried by the cutter-carrier adapted to engage the trip-dog when the cutter-carrier is depressed, and

to engage the tooth 20 of the IIQl means for returning the trip-dog to its normal or operating position.

f combination of a work-carrier, a cutter mechanism comprising a cutter, means for lifting and depressing the cutter, a movable support for holding the cutterin an elevated position, a spring for returning the support to its normal or holding position, a trip-dog adapted to engage said suppport, a cam actuated by the cutter mechanism and adapted to engage with said trip-dog, means for actuating the trip-dog to trip the cutter, and a projection on the movable support for returning the trip-dog to its operative position.

3. In a buttonhole-sewing machine provided with a work-carrier and means for operating the same, an automatic cutting device comprising a cutter-carrier, means for operating the said cutter carrier, a movable holder adapted to normally retain the said cuttercarrier in an elevated position, means adapted to act on the said movable holder and trip the cu tter-carrier, and an auxiliary adj ustable holden` adapted to prevent the cutter from being brought into action until the Work-carrier has carried the work to the point Where the stitching mechanism is at or near the finishing end of the buttonhole.

4E. In a buttonhole-sewing machine provided with a Work-carrier, an automatic cutting device comprising the cutter-carrier which is held out of Aaction by a movable holder, means adapted to actuate the said movable holder and trip the cutter-carrier,an auxiliary holder adapted to prevent the cutter from being brought into action until the work-carrier has carried the Work to a point where the stitching mechanism is at or near the finishing end of the buttonhole, means in connection with the Work-carrier adapted to move the auxiliary holder out of engagement with the eutter-carrier, and means adapted to return the said auxiliary holder into engagement With the cutter-carrier.

5. The combination with a buttonhole-sewing machine having mechanism comprising a work-carrier, and a stop mechanism,of a cutter, a spring, said cutter held in an elevated position by a movable support against the action of said spring, a second support for said cutter, said second support operated through the movement of the Work-carrier, and the said first su pport operated through the movement of the stop mechanism.v

6. In combination in a buttonhole-sevving machine, stitching and feeding mechanism, a spring, an automatic cutting device held in an elevated position by a movable support against the action of the said spring, means for moving said support to trip the cutter,

and means independent of the needle-barfor y\lifting the said cutter.

7. In combination in a buttonhole-sewing machine, stitching and feeding mechanism, an automatic' cutting device, a spring adapted to depress the said cutting device, means for holding the cutting device in an elevated position against the action of the said spring, means for tripping the said cutting device, a lever separate from the stitch-forming mechanism, a means in combination with the said lever adapted to return the said cutting device to its elevated position.

S. In combination in a buttonhole-cutter device,a cutter-carrier,a movable holder adapted to retain the cutter-carrier in an elevated position, a device adapted to engage the said movable holder and trip the cutter-carrier into action, means for operating the said device, and means operated through the movement of the cutter-carrier adapted to disengage the said device from the movable holder and thereby permit the holder to return to its normal position.

9. In combination in a buttonhole-sewing machine, stitch-forming mechanism comprising a needl'e holder or bar, a feed mechanism, a spring, an automatic cutting device the cutter of which is held in an elevated position by a movable support against the action of the said spring, means for operating the support to trip the cutter, and means separate from the needle-bar and its operating parts rfor returning the cutter to its normal or elevated position.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

WILLIAM N. PARKES.

Witnesses:

EUGENIE P. HENDRICKSON, Gmo. W.` EISENHAUR. 

